If we do not want to stay at a Mariposa and take the YARTS into Yosemite, and if we do not want to take the train-bus from SF into Yosemite, and since we are not allowed to take a rental car from SF into Yosemite because chains are forbidden to be used on rental cars and even if we were to rent a 4WD or AWD, we are expected to bring chains along and since it is afterall a rental car, we cannot use chains, does this mean, the only way is to take a coach like from Extranomical or Incredible Adventures?

Reviews on Extra driving are very extreme, and Inc Ad is overbudget, this means, I may have to skip Yosemite this winter.